diff --git a/pyproject.toml b/pyproject.toml
index 5fcee1a..6912c4d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,6 +15,7 @@ classifiers = [
     "Programming Language :: Python :: 3.11",
     "Topic :: Internet :: WWW/HTTP",
     "Topic :: Internet :: WWW/HTTP :: WSGI :: Application",
+    "License :: OSI Approved :: GNU Affero General Public License v3 or later (AGPLv3+)",
 ]
 
 dependencies = [